Don't unset non-public properties, just hide them.

Before non-public properties were not reset also, trying to
unset them just caused a fatal php error, effectively crashing
the whole script.

tests/property_visibility-delete.phpt

@@ -0,0 +1,75 @@
+--TEST--
+Test V8::executeString() : Property visibility - delete
+--SKIPIF--
+<?php require_once(dirname(__FILE__) . '/skipif.inc'); ?>
+--FILE--
+<?php
+
+class Foo {
+	private $privBar = "privBar";
+	protected $protBar = "protBar";
+	public $pubBar = "pubBar";
+
+	public function dump($a)
+	{
+		var_dump(@$this->$a);
+	}
+}
+
+$js = new V8Js();
+$js->foo = new Foo();
+
+$script = <<<END
+
+var_dump(PHP.foo.privBar);
+delete PHP.foo.privBar;
+var_dump(PHP.foo.privBar);
+
+PHP.foo.privBar = 42;
+
+var_dump(PHP.foo.privBar);
+delete PHP.foo.privBar;
+var_dump(PHP.foo.privBar);
+
+var_dump(PHP.foo.protBar);
+delete PHP.foo.protBar;
+var_dump(PHP.foo.protBar);
+
+var_dump(PHP.foo.pubBar);
+delete PHP.foo.pubBar;
+var_dump(PHP.foo.pubBar);
+
+END;
+
+$js->foo->dump('privBar');
+$js->foo->dump('protBar');
+$js->foo->dump('pubBar');
+
+echo "--- JS ---\n";
+$js->executeString($script);
+
+echo "--- PHP ---\n";
+$js->foo->dump('privBar');
+$js->foo->dump('protBar');
+$js->foo->dump('pubBar');
+
+?>
+===EOF===
+--EXPECT--
+string(7) "privBar"
+string(7) "protBar"
+string(6) "pubBar"
+--- JS ---
+NULL
+NULL
+int(42)
+NULL
+NULL
+NULL
+string(6) "pubBar"
+NULL
+--- PHP ---
+string(7) "privBar"
+string(7) "protBar"
+NULL
+===EOF===

v8js_convert.cc

@@ -725,6 +725,7 @@ static inline v8::Local<v8::Value> php_v8js_named_property_callback(v8::Local<v8
 			zval *prop;
 			MAKE_STD_ZVAL(prop);
 			ZVAL_STRINGL(prop, name, name_len, 1);
+
 			if (callback_type == V8JS_PROP_QUERY) {
 				if (h->has_property(object, prop, 0 ZEND_HASH_KEY_NULL TSRMLS_CC)) {
 					ret_value = V8JS_UINT(v8::None);
@@ -732,8 +733,15 @@ static inline v8::Local<v8::Value> php_v8js_named_property_callback(v8::Local<v8
 					ret_value = v8::Handle<v8::Value>(); // empty handle
 				}
 			} else {
-				h->unset_property(object, prop ZEND_HASH_KEY_NULL TSRMLS_CC);
-				ret_value = V8JS_BOOL(true);
+				zend_property_info *property_info = zend_get_property_info(ce, prop, 1 TSRMLS_CC);
+
+				if(property_info && property_info->flags & ZEND_ACC_PUBLIC) {
+					h->unset_property(object, prop ZEND_HASH_KEY_NULL TSRMLS_CC);
+					ret_value = V8JS_BOOL(true);
+				}
+				else {
+					ret_value = v8::Handle<v8::Value>(); // empty handle
+				}
 			}
 			zval_ptr_dtor(&prop);
 		} else {